Dissertation
Dissertation > Medicine, health > Clinical > Diagnostics > Diagnostic Imaging > Magnetic resonance imaging

The White Matter Microstructure of Shooting Athletes: Quantitative Analysis with Diffusion Tensor Imaging

Author ChenDuiMei
Tutor WangJun
School Shanxi Medical
Course Medical Imaging and Nuclear Medicine
Keywords Diffusion tensor imaging Motor skills Brain Plasticity Corpus callosum Corticospinal tract
CLC R445.2
Type Master's thesis
Year 2010
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Objective: 1.5T magnetic resonance diffusion tensor imaging technology described in the the shooting athletes white matter structure anisotropy and diffusion characteristics of motor skill learning the white matter of the fine structure of athletes; further analysis of athletes white matter DTI index value movement start training age relationship. Methods: 20 cases of the Select Shanxi shooting team professional athletes, sports start training age 11-18 years, every day for at least 6h professional training; 20 cases over the same period of the age, gender match has not been any professional or amateur sports skills training healthy volunteers as a control group. All subjects were right-handed, no previous history of mental illness, traumatic brain injury and cerebral organic history. GE Signa Excite 1.5T MRI scanner, skull 8-channel phased-array coil, all subjects were first cranial MRI the conventional scanning sequence, including T1WI, T2WI and FLAIR to exclude brain lesions; the DTI scan using single-shot spin echo wave planar imaging (SE-EPI) sequence, b value 1000s/mm2, diffusion gradient direction 25 will be sent to the the DTI raw image data SUNAW4.3 workstation for post-processing and post-processing the the application supplied Functool software, reconstruct the average diffusion coefficient (average diffusion coefficient, DCavg) Figure and fractional anisotropy (fractional anisotropy, FA) maps, were bilateral corpus callosum body, knee, pressure and cerebral peduncle, internal capsule, the hindlimb level corticospinal tract (CST) Walking the line area manually placed ROIs oval, and measured the the above ROIs FA values ??and DCavg value. FA value of the different parts, DCavg value between athletes and control groups whether differences using independent sample t-test analysis; Pearson correlation analysis of the area FA DTI parameter values ??exist between the various parts of the two groups was statistically significant, further value and (or) DCavg value and athletes started training age; left and right sides symmetrical parts FA value, DCavg value differences using a paired t-test analysis. Results: 1. Athlete group bilateral corpus callosum body and the right side of the plane PLIC CST traveling regional FA value higher than that of the control group, and between the two groups, the difference was statistically significant (P <0.05); bilateral corpus callosum knee Ministry, bilateral corpus callosum and left internal capsule The the hindlimb plane, bilateral cerebral peduncle plane CST go the line regional FA values ??between the two groups showed no significant difference (P> 0.05). 2 DCavg value of each region of interest between athletes and control groups showed no significant difference (P> 0.05). Bilateral corpus callosum body FA value movement started training age was negatively correlated (P <0.05): the right PLIC plane CST regional FA values ??and movement before running training age no significant correlation, but with the start of the move to increase in the age of the Institute FA value downward trend. 4 all subjects brain left and right sides symmetrical parts FA values, DCavg value was no significant difference (P gt; 0.05). Conclusion: shooting athletes white matter microstructure different from ordinary people. Motor skill learning white matter structure of the plastic changes caused by sports-related areas, and this is far more dramatic changes in the athletes early stage of development. Motor skill learning white matter plasticity theory, excellent shooting athletes have more fine motor coordination athletic ability to provide the scientific evidence of possible brain provides new evidence and inspiration, but also as a therapeutic approach for clinical motor function disorders.

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